Steve takes out a $175,000 mortgage for 20 years. He makes monthly payments and at the end calculates that he has paid $255,125 toward the mortgage. What was the approximate APR of the loan?

At the beginning of the year, adrian's savings account balance was \$28$28. each week, he deposits another \$15$15 into that account, and he doesn't spend any of his savings. is his savings account balance proportional to the number of weeks since the start of the year?